. . While recent scholarship has – for the past two decades – endeavoured to transcend initial reservations about these forms of testimony, the difficulty with some of these memoirs – namely their authors’ implicit complicity in unethical medical research and in the Nazi Holocaust in general – remains however problematic. To address this thorny issue, in this article I consider the memoirs of a Jewish inmate doctor and forensic pathologist who worked with and for SS medical officers in Auschwitz, particularly Josef Mengele. His name was Mikló Nyiszli. . .